-10-
INSTRUCTION MANUAL
AIRFREE SERIES
Code
Desc.
Reason
Solution
E. oCxx
Mid-
acceleration/mid-
deceleration/mid-
speed/over-current
fault
Overload
Reducing load or replacing impulse load of large capacity
controller requires reducing load change frequency or
replacing larger capacity controller
Short circuit to the output
side of the controller
Check main circuit, eliminate short circuit
Motor damaged
Measure the resistance between the lines of the motor and
replace the motor immediately if conduction
Too short
acceleration/deceleration
time
Increase F01.22 [acceleration time 1] increase F01.23
[deceleration time 1] replace bulk control
Overvoltage suppression of
rising frequency may result
in accelerated overcurrent
fault
Decrease overvoltage gain F10.13[ overvoltage gain)
Overflow suppression of
frequency reduction
resulting in deceleration
over current fault
Increase overcurrent suppression gain F10.02[ overcurrent
suppression gain]
Controller output cable
exceeds allowable
maximum
Shorten output cable or add sinusoidal filter
Mis-operation caused by
interference
Check the wiring of control circuit, main circuit and ground,
remove interference source
Notice: this fault is detected when the output current of the controller exceeds the overcurrent point.
Code
Desc.
Reason
Solution
E. oUxx
Mid-
acceleration/mo
derate/mid-
speed/stop/over
-voltage fault
High voltage
Reduce the supply voltage to a specified rang
Controller output or motor
short circuit
Check main circuit wiring, eliminate short circuit
Too short
acceleration/deceleration
time
Determine whether the acceleration stops. The fault
detection increases F01.22[ acceleration time 1] increases
F01.23[ deceleration time 1]
Overvoltage suppression of
frequency rise may result in
accelerated overvoltage
fault
Increase overvoltage suppression gain F10.13[ overvoltage
suppression gain]
Over-current suppression of
frequency-lowering
overvoltage fault
Decreasing overcurrent suppression gain F10.02[ overcurrent
suppression gain] and reducing load
Surge voltage mixed with
input voltage
Add reactor to input side
Improper setting of speed
tracking parameters
Change of Speed Tracking Parameters (F07.25~F07.28)
Notice: this fault is detected when the bus voltage exceeds the overvoltage point. Three-phase input overvoltage point is 820 V,
single-phase input overvoltage point is 400 V.
